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util.iterators: Add skip() to skip the first n items of an iterator

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Matthew Wild 2010-07-20 12:37:28 +01:00
parent 143af24d62
commit 9a9e9b1c1a
1 changed files with 9 additions and 0 deletions
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9
util/iterators.lua
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@ -90,6 +90,15 @@ function head(n, f, s, var)
end, s; end, s;
end end
-- Skip the first n items an iterator returns
function skip(n, f, s, var)
for i=1,n do
var = f(s, var);
end
return f, s, var;
end
-- Return the last n items an iterator returns
function tail(n, f, s, var) function tail(n, f, s, var)
local results, count = {}, 0; local results, count = {}, 0;
while true do while true do